trunk: small change to ivector-extractor-acc-stats.cc (make it less...

trunk: small change to ivector-extractor-acc-stats.cc (make it less memory-hungry when forking to open tables)

git-svn-id: https://svn.code.sf.net/p/kaldi/code/trunk@3413 5e6a8d80-dfce-4ca6-a32a-6e07a63d50c8

src/ivectorbin/ivector-extractor-acc-stats.cc

@@ -62,7 +62,6 @@ class IvectorTask {
 int main(int argc, char *argv[]) {
   using namespace kaldi;
   typedef kaldi::int32 int32;
-  typedef kaldi::int64 int64;
   try {
     const char *usage =
         "Accumulate stats for iVector extractor training\n"
@@ -95,6 +94,14 @@ int main(int argc, char *argv[]) {
         posteriors_rspecifier = po.GetArg(3),
         accs_wxfilename = po.GetArg(4);
 
+
+    // Initialize these Reader objects before reading the IvectorExtractor,
+    // because it uses up a lot of memory and any fork() after that will
+    // be in danger of causing an allocation failure.
+    SequentialBaseFloatMatrixReader feature_reader(feature_rspecifier);
+    RandomAccessPosteriorReader posteriors_reader(posteriors_rspecifier);
+
+    
     IvectorExtractor extractor;
     ReadKaldiObject(ivector_extractor_rxfilename, &extractor);
     
@@ -104,10 +111,6 @@ int main(int argc, char *argv[]) {
     int64 tot_t = 0;
     int32 num_done = 0, num_err = 0;
     
-
-    SequentialBaseFloatMatrixReader feature_reader(feature_rspecifier);
-    RandomAccessPosteriorReader posteriors_reader(posteriors_rspecifier);
-
     {
       TaskSequencer<IvectorTask> sequencer(sequencer_opts);